<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>my css2</title>
    <link rel="stylesheet" href="mycss2.css">
</head>
<body>
<div>这个链接是：<a href="http://www.microsoft.com">微软官方站点</a></div>
<hr>
<div>
    <h6 class="c3">6号标题</h6>
    <h4 class="c3">4号标题</h4>
    <h5>5号标题</h5>
    <p>这是一个段落</p>
</div>
<hr>
<div id="i1">id选择器</div>
<div id="i2">这也是id选择器</div>
<div>本章讲解<span class="web">网页制作</span>，什么是<span class="web">网页制作</span>呢？<span class="web">网页制作</span>就是做网页</div>
<div class="c1">
    <h3>这是三号标题</h3>
</div>
<div class="important">重要的</div>
<div class="warning">警告</div>
<div class="warning important">重要、警告</div>

</body>
</html>